teldufalsari/kmath
2
0
Fork 0
forked from kscience/kmath
Code Pull Requests 1 Activity

Add origin (optin) extension property to expose MatrixWrapper content

Browse Source
This commit is contained in:
Alexander Nozik 2021-01-20 15:32:55 +03:00
parent d00e7434a4
commit 881b85a1d9
3 changed files with 24 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kmath-commons/src/main/kotlin/kscience/kmath/commons/linear/CMMatrix.kt
View File

@ -2,8 +2,8 @@ package kscience.kmath.commons.linear
import kscience.kmath.linear.DiagonalFeature
import kscience.kmath.linear.MatrixContext
import kscience.kmath.linear.MatrixWrapper
import kscience.kmath.linear.Point
import kscience.kmath.linear.origin
import kscience.kmath.misc.UnstableKMathAPI
import kscience.kmath.structures.Matrix
import org.apache.commons.math3.linear.*
@ -47,9 +47,9 @@ public object CMMatrixContext : MatrixContext<Double, CMMatrix> {
return CMMatrix(Array2DRowRealMatrix(array))
}
public fun Matrix<Double>.toCM(): CMMatrix = when {
this is CMMatrix -> this
this is MatrixWrapper && matrix is CMMatrix -> matrix as CMMatrix
@OptIn(UnstableKMathAPI::class)
public fun Matrix<Double>.toCM(): CMMatrix = when (val matrix = origin) {
is CMMatrix -> matrix
else -> {
//TODO add feature analysis
val array = Array(rowNum) { i -> DoubleArray(colNum) { j -> get(i, j) } }

25
kmath-core/src/commonMain/kotlin/kscience/kmath/linear/MatrixWrapper.kt
View File

@ -15,30 +15,37 @@ import kotlin.reflect.safeCast
*
* @param T the type of items.
*/
public class MatrixWrapper<T : Any>(
public val matrix: Matrix<T>,
public class MatrixWrapper<T : Any> internal constructor(
public val origin: Matrix<T>,
public val features: Set<MatrixFeature>,
) : Matrix<T> by matrix {
) : Matrix<T> by origin {
/**
* Get the first feature matching given class. Does not guarantee that matrix has only one feature matching the criteria
*/
@UnstableKMathAPI
override fun <T : Any> getFeature(type: KClass<T>): T? = type.safeCast(features.find { type.isInstance(it) })
?: matrix.getFeature(type)
?: origin.getFeature(type)
override fun equals(other: Any?): Boolean = matrix == other
override fun hashCode(): Int = matrix.hashCode()
override fun equals(other: Any?): Boolean = origin == other
override fun hashCode(): Int = origin.hashCode()
override fun toString(): String {
return "MatrixWrapper(matrix=$matrix, features=$features)"
return "MatrixWrapper(matrix=$origin, features=$features)"
}
}
/**
* Return the original matrix. If this is a wrapper, return its origin. If not, this matrix.
* Origin does not necessary store all features.
*/
@UnstableKMathAPI
public val <T : Any> Matrix<T>.origin: Matrix<T> get() = (this as? MatrixWrapper)?.origin ?: this
/**
* Add a single feature to a [Matrix]
*/
public operator fun <T : Any> Matrix<T>.plus(newFeature: MatrixFeature): MatrixWrapper<T> = if (this is MatrixWrapper) {
MatrixWrapper(matrix, features + newFeature)
MatrixWrapper(origin, features + newFeature)
} else {
MatrixWrapper(this, setOf(newFeature))
}
@ -48,7 +55,7 @@ public operator fun <T : Any> Matrix<T>.plus(newFeature: MatrixFeature): MatrixW
*/
public operator fun <T : Any> Matrix<T>.plus(newFeatures: Collection<MatrixFeature>): MatrixWrapper<T> =
if (this is MatrixWrapper) {
MatrixWrapper(matrix, features + newFeatures)
MatrixWrapper(origin, features + newFeatures)
} else {
MatrixWrapper(this, newFeatures.toSet())
}

8
kmath-ejml/src/main/kotlin/kscience/kmath/ejml/EjmlMatrixContext.kt
View File

@ -2,8 +2,8 @@ package kscience.kmath.ejml
import kscience.kmath.linear.InverseMatrixFeature
import kscience.kmath.linear.MatrixContext
import kscience.kmath.linear.MatrixWrapper
import kscience.kmath.linear.Point
import kscience.kmath.linear.origin
import kscience.kmath.misc.UnstableKMathAPI
import kscience.kmath.structures.Matrix
import kscience.kmath.structures.getFeature
@ -19,9 +19,9 @@ public object EjmlMatrixContext : MatrixContext<Double, EjmlMatrix> {
/**
* Converts this matrix to EJML one.
*/
public fun Matrix<Double>.toEjml(): EjmlMatrix = when {
this is EjmlMatrix -> this
this is MatrixWrapper && matrix is EjmlMatrix -> matrix as EjmlMatrix
@OptIn(UnstableKMathAPI::class)
public fun Matrix<Double>.toEjml(): EjmlMatrix = when (val matrix = origin) {
is EjmlMatrix -> matrix
else -> produce(rowNum, colNum) { i, j -> get(i, j) }
}